tergum

As an initialism notam

is (aviation) notice to airmen (to inform pilots of hazards).

As a noun tergum is

(biology) the upper or dorsal surface of an articulated animal such as an arthropod.

As a noun tergum is

(biology) the upper or dorsal surface of an articulated animal such as an arthropod.

As nouns the difference between tergum and sternum

is that tergum is (biology) the upper or dorsal surface of an articulated animal such as an arthropod while sternum is the breastbone.

As nouns the difference between tergum and targum

is that tergum is the upper or dorsal surface of an articulated animal such as an arthropod while targum is an Aramaic translation of the Tanakh written or compiled between the Second Temple period and the early Middle Ages.

As nouns the difference between taxonomy and tergum

is that taxonomy is the science or the technique used to make a classification while tergum is (biology) the upper or dorsal surface of an articulated animal such as an arthropod.

As nouns the difference between tergum and pleuron

is that tergum is the upper or dorsal surface of an articulated animal such as an arthropod while pleuron is a lateral sclerite of a thoracic segment of an arthropod between the tergum and the sternum.

Tergite is a related term of tergum.

As nouns the difference between tergum and tergite

is that tergum is the upper or dorsal surface of an articulated animal such as an arthropod while tergite is the dorsal portion of an articulate animal's arthromere or somite.